Teeth whitening mouthpiece



FIG. 1 is an upper right and rear perspective view of a teeth whitening mouthpiece showing my new design.

FIG. 2 is an upper left and front perspective view thereof.

FIG. 3 is a top plan view thereof.

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a right side elevational view thereof. 

The ornamental design for a teeth whitening mouthpiece, as shown and described. 